Key-fastener.



W. OURLETT.

KEY FASTENER. APPLICATION FILED AUG. 27, 1908.

927,835, Patented July 13, 1909.

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mnazw. a GRAHAM co. Prlomwmcmynsns. WASMINDTH" n UNKTE 1 WILLIAM G'URL'ETT, OF SAN FRANCISCO, CALIFORNIA.

KEY-FASTENER.

Specification of Letters Patent.

Patented July 13, 1909.

Application filed August 27, 1908. Serial No. 450,538.

To all 107mm it may concern:

Be it known that 1, WILLIAM CUnLn'r'r, citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Key-Fasteners, of which the following is a specification.

My invention pertains to locks, and more particularly to means for fastening keys therein; and its novelty, utility and prac tical advantages will be fully understood from the following description and claim when the same are read in connection with the drawings, accompanying and forming part of this specification, in which Figure 1 is a sectional View illustrating a lock equipped with my improvements, and also illustrating a key properly arranged rel ative to the lock and the improvements. Fig. 2 is an elevation showing the cscuteheon and the gravitating bolt comprised in my improvements. Fig. 3 is a diagrammatic view illustrating the relative arrangement of the disk and the gravitating bolt comprised in my improvements when the keyhole in the disk is in registration with that in the escutcheon. Fig. 4 is a view like Fig. 3, but showing the disk and the gravitating bolt in dillerent positions. Fig. 5 is a detail view, partly in elevation and partly in section, showing a modi'lied disk and key constructed in accordance with my invention. Fig. 6 is an edge elevation of the modified disk.

Similar letters designate corresponding parts in all of the views of the drawings, referring to which:

A is a door equipped with a lock B ol" the conventional construction or of any other construction consonant with the purpose ol my invention.

C is the key complementary to the lock, which key is preferably of the ordinary construction, with the exception that it is pro vided on its shank a with a radial projection I).

D is an escutcheon fixed on the inner face of the door and having a keyhole c alined with that of the lock and a notch (1 extending upwardly from the upper end of the keyhole c and also having a vertical slot 6 arranged above and in line with the keyhole c.

E is the disk of my improvements, and F is the gravitating bolt for cooperating with the disk E in the manner hereinafter set forth in detail.

Suitably attached to the inner side of the escutcheon D is a llangef of angular form in cross-sectii'in, and in the said flange and between the same and the adjacent side of the cscutcheon l) the disk E is retained in such manner that it is adapted to rotate or turn through a part of a revolution with the before mentioned key 0. As best shown in Figs. 3 and 1, the disk E is provided with a keyhole c and a notch d similar to the corresponding features of the escutcheon l), and said disk is also provided with a notch of V-shape, and a notch 71 of U-shape; both of the said notches being formed in the periphery of the disk and about the proportional distance illustrated apart.

As best shown in 1, the gravitating bolt F is disposed with its major portion at the inner side of the escutcheon l and is provided with a depending portion i, disposed at the inner side of the llangcf, and. is also provided with a rectangular portion arranged and movable vertically in the slot 6 of the escutchcon, and carrying a threaded shank l: for the connection of a knob or linger-piece Z.

It will be readily understood from the foregoing that when the key (1 is placed in the lock from the inside of the door, the projection l) on the shank of the key will assmnc a position inside ol the cscutchcon D and in the notch. d of the disk E. At this time the gravitating bolt F rests in the notch-g of the disk E, the purpose oi said engagement being to prevent casual movement oi the disk E from its normal position, in which position its keyhole 0* is coincident with the keyhole ol' the look. When the key is turned to shoot the bolt of the lock, the projection l) on the key shank will turn the disk E with the key so as to carry the ke 'hole oi the disk out 01 registration with the keyhole in the escutchcon, and at the same time carry the notch 71- to a position under the bolt F, whereupon the said bolt F will seat in said notch la and by so doing will lock the disk E in a position to guard and seal the keyhole in the escutchcon D. From this it follows that the disk E is adapted when locked to prevent displacement of the key and picking ol' the lock, and is also adapted to ellcctually close the keyhole c in the escutchcon which advantageous for obvious reasons. It also follows that when a person at the inside of the door is desirous of opening the door, it 1s simply necessary for such person to first raise the bolt F and then turn the key C, since when this is done the disk E will be turned until its notch g is presented to the bolt F, at which time the drop of the bolt and the retardation of the disk E will apprise the person of the fact that the keyholes c c are in registration and that consequently the key may be withdrawn from the door if desired.

The modified key 0 of Fig. 5, differs from the key shown in Fig. 1 in that its projection 6 extends laterally inward from its shank. The modified disk E of Figs. 5 and 6 has a keyhole c to receive the key C and also has projections c at opposite sides which render it reversible and adapt it to turn freely at the inner side of the escutcheon. In this connection it will be noted that the illustrated arrangement of the projection Z) on the shank of the key C renders it unnecessary to provide the disk E with a notch d such as shown in Figs. 3 and 4.

It will be gathered from the foregoing that all of the parts of my improvements are carried by the escutcheon D; also, that the construction as a Whole is simple and inexpensive and at the same time is reliable in operation, this latter being largely due to the fact that the specific arrangement of the bolt F and the finger-piece Z, relative to the other palrts, assures free vertical movement of the Having described my invention, what I claim and desire to secure by Letters-Patent, is:

The key fastener described comprising an escutcheon having a keyhole and a vertical slot disposed above the keyhole and also having a fiangef at its inner side, a rotatable disk retained in said flange and between the same and the inner side of the escutcheon and having a keyhole and also having spaced notches in its periphery, one of which is com paratively shallow, a gravitating bolt movable above the disk and into and out of the notches thereof and arranged at the inner side of the escutcheon and having a depending portion i disposed at the inner side of the flange f and also having a rectangular portionj arranged and movable vertically in the slot of the escutcheon, and a fmger-piece con nected with said portion of the bolt and ar ranged against the outer side of the escutcheon.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JEANNE E. DoTTY, EDITH W. BURNHAM. 

